Literary usage of Helmet flower

Below you will find example usage of this term as found in modern and/or classical literature:

1.Flora Domestica, Or, The Portable Flower-garden: With Directions for the by Elizabeth Kent, Leigh Hunt (1831)"THE kinds of Helmet-flower most generally cultivated in our gardens, are the
Oriental, with yellow flowers, blowing in May, June, and July ; the Alpine, ..."

2.The Shakespeare Garden by Esther Singleton (1922)""The helmet flower," he writes, "hath divers leaves of a fresh green color on
the upper side and grayish underneath, much spread abroad and cut into many ..."